DISCOVERY OF X-RAYS
When were x-rays discovered?
November 8, 1895
What is the process of boiling off electrons called?
Thermionic Emission
What device changes alternating current to direct current?
Rectifier
What is kinetic energy?
Energy in motion
The overall blackness of an image is __________
Density
Who discovered x-rays?
Wilhelm Conrad Roentgen
Which side of the x-ray tube is negative?
Cathode
Which side of the circuit is the mA meter located on?
Secondary (High Voltage) Side
The number of protons in an element is ___________
Atomic Number
What principle states that you can use any combo of mA & time to get the same mAs
Law of Reciprocity
Clarence Dally
What are the anode and filaments made of?
Tungsten
What type of current does the x-ray tube require?
Direct Current
When an atom gains an electron, it is called ________
Anion
Which focal spot would we use to create better detail?
Small Focal Spot
How long did the first x-ray take?
15 minutes
What is the glass envelope made of?
Pyrex
What setting on our control panel moves the electrons from cathode to anode?
kVp
In Compton interactions, incoming x-rays interact with a/an
Outer shell electron
What are the shades of gray on an image?
Contrast
How fast do x-rays travel?
The larger part of the patient should be place under the cathode side of the tube according to_______
The Anode Heel Effect
According to the Line Focus Principle, where is the effective focal spot?
on the patient
Name 2 interactions with matter that do not occur in routine radiography?
Pair Production, Photodisintegration
Which would create more scatter, high kVp or low kVp?
High kVp